Comprar créditos

POST /v1/message-credits/purchase

curl -X POST https://api.socialsell.ai/v1/message-credits/purchase \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{"amountCents": 50000, "billingType": "PIX"}'

{
  "data": {
    "payment_id": "pay_abc123",
    "amount_cents": 50000,
    "pix": {
      "qr_code": "00020126...",
      "copy_paste": "00020126...",
      "expires_at": "2026-06-10T16:30:00.000Z"
    }
  }
}